The current NASA shuttle fleet is set to retire by the end of 2010 and will be replaced no sooner than 2015 by a new system.

NASA is currently in the design and testing phase on the replacement to the shuttle fleet. NASA is planning on a return to rocket power similar to the method used to get the Apollo 11 astronauts into space for their moon landing. The new space flight program is called constellation and NASA is defending the program asserting that it is not too expensive or too risky.

A committee appointed by President Obama and engineers working on the Constellation program at NASA has had to defend its work to the committee reports MSNBC. Head NASA researchers have spent four years designing the Ares rocket that will replace the shuttle fleet and maintain that the program is the safest and fastest way to get America back into space.

Steve Cook, head of the Ares project said, "We have done what we said we would do, and we are well on the way to our first test flight."

MSNBC reports that other managers on the Ares program told members of the committee that they were working through technical issues with the rocket system. One fear is that powerful energy waves created during launch would injure astronauts or make it impossible for them to perform basic duties. The chance of this happening is admittedly slim according to the managers.

Broad options will reportedly be offered to Obama from continuing to use the shuttle fleet to moving forward with the Constellation program unchanged. The final report from the committee will be presented on August 31. NASA plans to test a version of the Ares I rocket by October 31.

"There is a single light of science, and to brighten it anywhere is to brighten it everywhere." -- Isaac Asimov